Dremel 9100 Operating/Safety Instructions Manual page 13

DM 2610Z04970 10-13_9100 10/9/13 7:52 AM Page 13
Needs for Slower Speeds
Certain materials, however, (some plastics and
precious metals, for example) require a
relatively slow speed because at high speed
the friction of the accessory generates heat
and may cause damage to the material.
Slow speeds (15,000 RPM or less) usually are
best for polishing operations employing the felt
polishing accessories. They may also be best
for working on delicate projects as "eggery"
work, delicate wood carving and fragile model
parts. All brushing applications require
lower speeds to avoid wire discharge from
the holder.
Do not press the Variable
W RNING
Speed Foot Pedal more
than half way when using wire brushes.
Operating wire brushes at speed higher than
15,000/min (RPM) may lead to personal injury
or property damage.
Higher speeds are better for carving, cutting,
routing, shaping, cutting dadoes or rabbets in
wood.
Hardwoods, metals and glass require high
speed operation, and drilling should also be
done at high speeds.
Many applications and accessories in our line
will provide the best performance at full speed,
but for certain materials, applications, and
accessories, you need slower speeds, which is
the reason our variable speed models are
available.
Ultimately, the best way to determine the
correct speed for work on any material is to
practice for a few minutes on a piece of scrap,
Use only Dremel
even after referring to the chart. You can
quickly learn that a slower or faster speed is
more effective just by observing what happens
as you make a pass or two at different speeds.
When working with plastic, for example, start
at a slow rate of speed and increase the speed
until you observe that the plastic is melting at
the point of contact. Then reduce the speed
slightly to get the optimum working speed.
Some rules of thumb in regard to speed:
1. Plastic and other materials that melt at low
temperatures should be cut at low speeds.
2. Polishing, buffing and cleaning with any type
of bristle brush must be done at speeds not
greater than 15,000 RPM to prevent damage
to the brush from bristles flying toward
operator.
3. Wood should be cut at high speed.
4. Iron or steel should be cut at high speed. If a
high speed steel cutter starts to chatter — this
normally means it is running too slow.
5. Aluminum, copper alloys, lead alloys, zinc
alloys and tin may be cut at various speeds,
depending on the type of cutting being done.
Use paraffin or other suitable lubricant on the
cutter to prevent the cut material from adhering
to the cutter teeth.
Increasing the pressure on the tool is not the
answer when it is not performing as you think it
should. Perhaps you should be using a
different accessory, and perhaps an
adjustment in speed would solve the problem.
Leaning on the tool does not help.
Let speed do the work!
, high-performance accessories.
®
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